Second seed Sania Mirza and Vania King suffered a shock straight-set defeat at the hands of unseeded French pair of Julie Coin and Mathilde to crash out of the doubles event of the Japan Open Tennis tournament at Osaka today. The Indo-American pair lost 4-6, 2-6 in the quarter-final after battling for one hour and seven minutes.To survive in the event, Sania will have to beat World number 13 and second seed Marion Bartoli of France in the singles competition tomorrow.